/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=LOWLEXORDER -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/sum04-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 18:48:50,546 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 18:48:50,549 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 18:48:50,586 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-18 18:48:50,607 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 18:48:50,610 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 18:48:50,612 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 18:48:50,613 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 18:48:50,615 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 18:48:50,616 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 18:48:50,617 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 18:48:50,625 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 18:48:50,627 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 18:48:50,628 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 18:48:50,629 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 18:48:50,629 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 18:48:50,641 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 18:48:50,656 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 18:48:50,657 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 18:48:50,658 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 18:48:50,658 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 18:48:50,679 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 18:48:50,679 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 18:48:50,680 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 18:48:50,681 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 18:48:50,681 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 18:48:50,681 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 18:48:50,681 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 18:48:50,681 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 18:48:50,682 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 18:48:50,682 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 18:48:50,682 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 18:48:50,682 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 18:48:50,682 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 18:48:50,682 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 18:48:50,683 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 18:48:50,683 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 18:48:50,683 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 18:48:50,683 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 18:48:50,683 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 18:48:50,684 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 18:48:50,687 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 18:48:50,687 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 18:48:50,687 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 18:48:50,687 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 18:48:50,687 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 18:48:50,688 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 18:48:50,688 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 18:48:50,688 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 18:48:50,688 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 18:48:50,688 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=LOWLEXORDER; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=LOWLEXORDER; [2020-08-18 18:48:50,999 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 18:48:51,016 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 18:48:51,021 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 18:48:51,022 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 18:48:51,023 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 18:48:51,024 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum04-1.i [2020-08-18 18:48:51,094 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d8b08b1a6/67ac69b274e24bdea22d22452edd6591/FLAG27184089c [2020-08-18 18:48:51,544 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 18:48:51,544 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum04-1.i [2020-08-18 18:48:51,550 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d8b08b1a6/67ac69b274e24bdea22d22452edd6591/FLAG27184089c [2020-08-18 18:48:51,927 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d8b08b1a6/67ac69b274e24bdea22d22452edd6591 [2020-08-18 18:48:51,938 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 18:48:51,939 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 18:48:51,940 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 18:48:51,941 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 18:48:51,944 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 18:48:51,946 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 06:48:51" (1/1) ... [2020-08-18 18:48:51,948 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25dd80d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:48:51, skipping insertion in model container [2020-08-18 18:48:51,949 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 06:48:51" (1/1) ... [2020-08-18 18:48:51,957 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 18:48:51,973 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 18:48:52,140 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 18:48:52,145 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 18:48:52,160 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 18:48:52,174 INFO L208 MainTranslator]: Completed translation [2020-08-18 18:48:52,175 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:48:52 WrapperNode [2020-08-18 18:48:52,175 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 18:48:52,176 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 18:48:52,176 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 18:48:52,176 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 18:48:52,187 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:48:52" (1/1) ... [2020-08-18 18:48:52,187 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:48:52" (1/1) ... [2020-08-18 18:48:52,191 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:48:52" (1/1) ... [2020-08-18 18:48:52,192 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:48:52" (1/1) ... [2020-08-18 18:48:52,283 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:48:52" (1/1) ... [2020-08-18 18:48:52,288 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:48:52" (1/1) ... [2020-08-18 18:48:52,289 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:48:52" (1/1) ... [2020-08-18 18:48:52,290 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 18:48:52,290 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 18:48:52,291 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 18:48:52,291 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 18:48:52,292 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:48:52" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 18:48:52,359 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 18:48:52,360 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 18:48:52,360 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-18 18:48:52,360 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 18:48:52,360 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 18:48:52,360 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-18 18:48:52,360 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 18:48:52,361 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 18:48:52,361 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 18:48:52,543 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 18:48:52,543 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-18 18:48:52,547 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 06:48:52 BoogieIcfgContainer [2020-08-18 18:48:52,547 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 18:48:52,548 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 18:48:52,548 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 18:48:52,551 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 18:48:52,551 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 06:48:51" (1/3) ... [2020-08-18 18:48:52,552 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c7e14f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 06:48:52, skipping insertion in model container [2020-08-18 18:48:52,552 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:48:52" (2/3) ... [2020-08-18 18:48:52,553 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c7e14f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 06:48:52, skipping insertion in model container [2020-08-18 18:48:52,553 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 06:48:52" (3/3) ... [2020-08-18 18:48:52,554 INFO L109 eAbstractionObserver]: Analyzing ICFG sum04-1.i [2020-08-18 18:48:52,565 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 18:48:52,572 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 18:48:52,587 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 18:48:52,611 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 18:48:52,611 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 18:48:52,611 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 18:48:52,611 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 18:48:52,611 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 18:48:52,611 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 18:48:52,612 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 18:48:52,612 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 18:48:52,627 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-08-18 18:48:52,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-18 18:48:52,632 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:48:52,632 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:48:52,633 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:48:52,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:48:52,638 INFO L82 PathProgramCache]: Analyzing trace with hash -721501374, now seen corresponding path program 1 times [2020-08-18 18:48:52,645 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:48:52,645 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1368352471] [2020-08-18 18:48:52,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:48:52,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:48:52,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:48:52,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:48:52,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:48:52,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1368352471] [2020-08-18 18:48:52,759 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:48:52,759 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-18 18:48:52,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104718343] [2020-08-18 18:48:52,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-18 18:48:52,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:48:52,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-18 18:48:52,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-18 18:48:52,777 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2020-08-18 18:48:52,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:48:52,796 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2020-08-18 18:48:52,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-18 18:48:52,797 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-08-18 18:48:52,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:48:52,804 INFO L225 Difference]: With dead ends: 30 [2020-08-18 18:48:52,804 INFO L226 Difference]: Without dead ends: 13 [2020-08-18 18:48:52,807 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-18 18:48:52,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-08-18 18:48:52,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-08-18 18:48:52,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-08-18 18:48:52,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-08-18 18:48:52,838 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2020-08-18 18:48:52,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:48:52,838 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-08-18 18:48:52,838 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-18 18:48:52,838 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2020-08-18 18:48:52,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-18 18:48:52,839 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:48:52,839 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:48:52,840 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 18:48:52,840 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:48:52,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:48:52,841 INFO L82 PathProgramCache]: Analyzing trace with hash -731660105, now seen corresponding path program 1 times [2020-08-18 18:48:52,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:48:52,841 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1579144415] [2020-08-18 18:48:52,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:48:52,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:48:52,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:48:52,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:48:52,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:48:52,957 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1579144415] [2020-08-18 18:48:52,958 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:48:52,958 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 18:48:52,959 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499574940] [2020-08-18 18:48:52,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 18:48:52,961 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:48:52,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 18:48:52,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:48:52,962 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 3 states. [2020-08-18 18:48:53,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:48:53,082 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2020-08-18 18:48:53,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 18:48:53,083 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-08-18 18:48:53,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:48:53,084 INFO L225 Difference]: With dead ends: 24 [2020-08-18 18:48:53,085 INFO L226 Difference]: Without dead ends: 16 [2020-08-18 18:48:53,086 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 18:48:53,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-08-18 18:48:53,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-08-18 18:48:53,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-08-18 18:48:53,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-08-18 18:48:53,095 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2020-08-18 18:48:53,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:48:53,095 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-08-18 18:48:53,095 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 18:48:53,095 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-08-18 18:48:53,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-18 18:48:53,097 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:48:53,097 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:48:53,098 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 18:48:53,098 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:48:53,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:48:53,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1637338477, now seen corresponding path program 1 times [2020-08-18 18:48:53,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:48:53,100 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [298612470] [2020-08-18 18:48:53,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:48:53,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:48:53,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:48:53,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:48:53,161 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:48:53,162 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [298612470] [2020-08-18 18:48:53,162 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:48:53,162 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-08-18 18:48:53,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982241044] [2020-08-18 18:48:53,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 18:48:53,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:48:53,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 18:48:53,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-08-18 18:48:53,165 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 4 states. [2020-08-18 18:48:53,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:48:53,206 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2020-08-18 18:48:53,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 18:48:53,207 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-08-18 18:48:53,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:48:53,208 INFO L225 Difference]: With dead ends: 27 [2020-08-18 18:48:53,208 INFO L226 Difference]: Without dead ends: 19 [2020-08-18 18:48:53,209 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-08-18 18:48:53,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-08-18 18:48:53,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2020-08-18 18:48:53,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-18 18:48:53,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-08-18 18:48:53,215 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-08-18 18:48:53,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:48:53,215 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-08-18 18:48:53,215 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 18:48:53,215 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-08-18 18:48:53,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-18 18:48:53,216 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:48:53,216 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:48:53,217 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 18:48:53,217 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:48:53,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:48:53,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1717165257, now seen corresponding path program 2 times [2020-08-18 18:48:53,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:48:53,218 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1485422706] [2020-08-18 18:48:53,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:48:53,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:48:53,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:48:53,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:48:53,273 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 18:48:53,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1485422706] [2020-08-18 18:48:53,274 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:48:53,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-18 18:48:53,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989975808] [2020-08-18 18:48:53,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 18:48:53,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:48:53,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 18:48:53,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-08-18 18:48:53,277 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 5 states. [2020-08-18 18:48:53,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:48:53,321 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2020-08-18 18:48:53,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 18:48:53,322 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-08-18 18:48:53,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:48:53,323 INFO L225 Difference]: With dead ends: 30 [2020-08-18 18:48:53,323 INFO L226 Difference]: Without dead ends: 22 [2020-08-18 18:48:53,324 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-08-18 18:48:53,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-08-18 18:48:53,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-08-18 18:48:53,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-18 18:48:53,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-08-18 18:48:53,330 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 16 [2020-08-18 18:48:53,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:48:53,331 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-08-18 18:48:53,331 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 18:48:53,331 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-08-18 18:48:53,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 18:48:53,332 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:48:53,332 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:48:53,333 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 18:48:53,333 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:48:53,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:48:53,334 INFO L82 PathProgramCache]: Analyzing trace with hash -424886253, now seen corresponding path program 3 times [2020-08-18 18:48:53,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:48:53,334 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [798228491] [2020-08-18 18:48:53,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:48:53,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:48:53,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:48:53,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:48:53,378 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-18 18:48:53,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [798228491] [2020-08-18 18:48:53,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:48:53,379 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 18:48:53,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25140677] [2020-08-18 18:48:53,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 18:48:53,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:48:53,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 18:48:53,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-08-18 18:48:53,381 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 4 states. [2020-08-18 18:48:53,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:48:53,411 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2020-08-18 18:48:53,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 18:48:53,412 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-08-18 18:48:53,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:48:53,413 INFO L225 Difference]: With dead ends: 30 [2020-08-18 18:48:53,413 INFO L226 Difference]: Without dead ends: 25 [2020-08-18 18:48:53,414 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-08-18 18:48:53,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-08-18 18:48:53,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2020-08-18 18:48:53,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-08-18 18:48:53,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-08-18 18:48:53,421 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 19 [2020-08-18 18:48:53,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:48:53,421 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-08-18 18:48:53,421 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 18:48:53,422 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-08-18 18:48:53,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 18:48:53,422 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:48:53,423 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:48:53,423 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 18:48:53,423 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:48:53,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:48:53,424 INFO L82 PathProgramCache]: Analyzing trace with hash -452912071, now seen corresponding path program 1 times [2020-08-18 18:48:53,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:48:53,424 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1793774799] [2020-08-18 18:48:53,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:48:53,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:48:53,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:48:53,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:48:53,538 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-18 18:48:53,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1793774799] [2020-08-18 18:48:53,539 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:48:53,539 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-18 18:48:53,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492744576] [2020-08-18 18:48:53,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 18:48:53,540 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:48:53,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 18:48:53,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-08-18 18:48:53,542 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 5 states. [2020-08-18 18:48:53,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:48:53,621 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2020-08-18 18:48:53,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 18:48:53,622 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-08-18 18:48:53,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:48:53,624 INFO L225 Difference]: With dead ends: 33 [2020-08-18 18:48:53,624 INFO L226 Difference]: Without dead ends: 28 [2020-08-18 18:48:53,625 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-08-18 18:48:53,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-18 18:48:53,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-08-18 18:48:53,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-08-18 18:48:53,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-08-18 18:48:53,632 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 22 [2020-08-18 18:48:53,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:48:53,633 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-08-18 18:48:53,633 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 18:48:53,633 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-08-18 18:48:53,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 18:48:53,634 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:48:53,634 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:48:53,635 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 18:48:53,635 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:48:53,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:48:53,635 INFO L82 PathProgramCache]: Analyzing trace with hash -2146400685, now seen corresponding path program 2 times [2020-08-18 18:48:53,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:48:53,636 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1051414720] [2020-08-18 18:48:53,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:48:53,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:48:53,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:48:53,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:48:53,701 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 21 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-18 18:48:53,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1051414720] [2020-08-18 18:48:53,702 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:48:53,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-18 18:48:53,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170626280] [2020-08-18 18:48:53,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 18:48:53,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:48:53,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 18:48:53,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-08-18 18:48:53,704 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 6 states. [2020-08-18 18:48:53,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:48:53,750 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2020-08-18 18:48:53,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 18:48:53,751 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-08-18 18:48:53,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:48:53,752 INFO L225 Difference]: With dead ends: 36 [2020-08-18 18:48:53,752 INFO L226 Difference]: Without dead ends: 31 [2020-08-18 18:48:53,752 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-08-18 18:48:53,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-08-18 18:48:53,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-08-18 18:48:53,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-08-18 18:48:53,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-08-18 18:48:53,759 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 25 [2020-08-18 18:48:53,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:48:53,760 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-08-18 18:48:53,760 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 18:48:53,760 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-08-18 18:48:53,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-18 18:48:53,761 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:48:53,761 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:48:53,762 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 18:48:53,762 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:48:53,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:48:53,762 INFO L82 PathProgramCache]: Analyzing trace with hash 115125753, now seen corresponding path program 3 times [2020-08-18 18:48:53,763 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:48:53,763 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [976820698] [2020-08-18 18:48:53,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:48:53,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:48:53,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:48:53,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:48:53,836 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 29 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-18 18:48:53,837 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [976820698] [2020-08-18 18:48:53,837 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:48:53,837 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 18:48:53,838 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425729282] [2020-08-18 18:48:53,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 18:48:53,838 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:48:53,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 18:48:53,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-08-18 18:48:53,839 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 7 states. [2020-08-18 18:48:53,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:48:53,887 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2020-08-18 18:48:53,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 18:48:53,887 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-08-18 18:48:53,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:48:53,888 INFO L225 Difference]: With dead ends: 39 [2020-08-18 18:48:53,888 INFO L226 Difference]: Without dead ends: 34 [2020-08-18 18:48:53,889 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-08-18 18:48:53,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-08-18 18:48:53,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-08-18 18:48:53,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-18 18:48:53,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-08-18 18:48:53,895 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 28 [2020-08-18 18:48:53,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:48:53,895 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-08-18 18:48:53,896 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 18:48:53,896 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-08-18 18:48:53,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-18 18:48:53,897 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:48:53,897 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:48:53,897 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 18:48:53,897 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:48:53,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:48:53,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1902732141, now seen corresponding path program 4 times [2020-08-18 18:48:53,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:48:53,898 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [550151876] [2020-08-18 18:48:53,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:48:53,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:48:53,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:48:53,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:48:54,000 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 37 proven. 26 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-18 18:48:54,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [550151876] [2020-08-18 18:48:54,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 18:48:54,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-18 18:48:54,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441950463] [2020-08-18 18:48:54,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 18:48:54,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:48:54,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 18:48:54,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-08-18 18:48:54,003 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 8 states. [2020-08-18 18:48:54,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:48:54,047 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2020-08-18 18:48:54,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 18:48:54,047 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-08-18 18:48:54,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:48:54,048 INFO L225 Difference]: With dead ends: 40 [2020-08-18 18:48:54,048 INFO L226 Difference]: Without dead ends: 35 [2020-08-18 18:48:54,049 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-08-18 18:48:54,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-08-18 18:48:54,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-08-18 18:48:54,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-08-18 18:48:54,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2020-08-18 18:48:54,054 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 31 [2020-08-18 18:48:54,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:48:54,055 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2020-08-18 18:48:54,055 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 18:48:54,055 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2020-08-18 18:48:54,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-18 18:48:54,056 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:48:54,056 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:48:54,056 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 18:48:54,057 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:48:54,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:48:54,057 INFO L82 PathProgramCache]: Analyzing trace with hash 749989817, now seen corresponding path program 5 times [2020-08-18 18:48:54,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:48:54,058 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1926148476] [2020-08-18 18:48:54,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:48:54,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 18:48:54,071 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 18:48:54,071 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 18:48:54,075 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 18:48:54,092 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 06:48:54 BoogieIcfgContainer [2020-08-18 18:48:54,093 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 18:48:54,095 INFO L168 Benchmark]: Toolchain (without parser) took 2155.39 ms. Allocated memory was 146.8 MB in the beginning and 235.4 MB in the end (delta: 88.6 MB). Free memory was 102.0 MB in the beginning and 178.7 MB in the end (delta: -76.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 7.1 GB. [2020-08-18 18:48:54,096 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 146.8 MB. Free memory was 120.0 MB in the beginning and 119.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-18 18:48:54,097 INFO L168 Benchmark]: CACSL2BoogieTranslator took 234.84 ms. Allocated memory is still 146.8 MB. Free memory was 101.5 MB in the beginning and 92.3 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-08-18 18:48:54,098 INFO L168 Benchmark]: Boogie Preprocessor took 114.39 ms. Allocated memory was 146.8 MB in the beginning and 202.9 MB in the end (delta: 56.1 MB). Free memory was 92.3 MB in the beginning and 182.0 MB in the end (delta: -89.7 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-08-18 18:48:54,099 INFO L168 Benchmark]: RCFGBuilder took 256.57 ms. Allocated memory is still 202.9 MB. Free memory was 182.0 MB in the beginning and 170.2 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 7.1 GB. [2020-08-18 18:48:54,100 INFO L168 Benchmark]: TraceAbstraction took 1544.74 ms. Allocated memory was 202.9 MB in the beginning and 235.4 MB in the end (delta: 32.5 MB). Free memory was 169.6 MB in the beginning and 178.7 MB in the end (delta: -9.1 MB). Peak memory consumption was 23.4 MB. Max. memory is 7.1 GB. [2020-08-18 18:48:54,103 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 146.8 MB. Free memory was 120.0 MB in the beginning and 119.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 234.84 ms. Allocated memory is still 146.8 MB. Free memory was 101.5 MB in the beginning and 92.3 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 114.39 ms. Allocated memory was 146.8 MB in the beginning and 202.9 MB in the end (delta: 56.1 MB). Free memory was 92.3 MB in the beginning and 182.0 MB in the end (delta: -89.7 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 256.57 ms. Allocated memory is still 202.9 MB. Free memory was 182.0 MB in the beginning and 170.2 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1544.74 ms. Allocated memory was 202.9 MB in the beginning and 235.4 MB in the end (delta: 32.5 MB). Free memory was 169.6 MB in the beginning and 178.7 MB in the end (delta: -9.1 MB). Peak memory consumption was 23.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, sn=0; [L13] i=1 [L13] COND TRUE i<=8 [L14] COND TRUE i<4 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=8 [L14] COND TRUE i<4 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=8 [L14] COND TRUE i<4 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=8 [L14] COND FALSE !(i<4) [L13] i++ [L13] COND TRUE i<=8 [L14] COND FALSE !(i<4) [L13] i++ [L13] COND TRUE i<=8 [L14] COND FALSE !(i<4) [L13] i++ [L13] COND TRUE i<=8 [L14] COND FALSE !(i<4) [L13] i++ [L13] COND TRUE i<=8 [L14] COND FALSE !(i<4) [L13] i++ [L13] COND FALSE !(i<=8) [L17] CALL __VERIFIER_assert(sn==8*(2) || sn == 0) [L4] COND TRUE !(cond) [L5] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.4s, OverallIterations: 10, TraceHistogramMax: 8, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 103 SDtfs, 57 SDslu, 208 SDs, 0 SdLazy, 136 SolverSat, 26 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 62 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 9 MinimizatonAttempts, 11 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 208 NumberOfCodeBlocks, 208 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 165 ConstructedInterpolants, 0 QuantifiedInterpolants, 5925 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 3 PerfectInterpolantSequences, 140/196 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...